CN104065175A - Broadband resonant type wireless electric energy transmission system - Google Patents
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- CN104065175A CN104065175A CN201410265326.7A CN201410265326A CN104065175A CN 104065175 A CN104065175 A CN 104065175A CN 201410265326 A CN201410265326 A CN 201410265326A CN 104065175 A CN104065175 A CN 104065175A
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Abstract
A broadband resonant type wireless electric energy transmission system comprises an energy emission end and an energy receiving end. The energy emission end comprises an isolated power pack, a human-computer interaction unit, a high-frequency signal generating unit, a signal amplification unit, a high frequency driving unit, a choking unit, a frequency conversion and power amplification unit, a first matching capacitor and an emission coil, wherein a resonant emission circuit is composed of the first matching capacitor and the emission coil. The energy receiving end comprises a receiving coil, a second matching capacitor, a frequency regulator and a working load, wherein a resonant receiving circuit is composed of the receiving coil and the second matching capacitor, and power is supplied to the working load through the frequency regulator.
Description
Technical field
The present invention relates to a kind of resonance type wireless electric energy transmission system.
Background technology
Wireless power transmission technology be holding load equipment with cordless the power delivery technology from power supply power taking.The problems such as wireless power transmission technology can effectively overcome equipment moving very flexible that line powering mode exists, takies volumetric spaces, easily produces contact sparking, has cable, cable connector exposure, motion contact surface abrasion, fail safe, reliability and the useful life of improving electric power system.Be specially adapted to Mobile Equipment, inflammable and explosive environment and under water, the safe power supply of oil gas underground equipment, to electromagnetic theory with for the development of power mode, there is great scientific meaning and more practical value, at industrial circles such as wireless sensor network, electric automobile, industrial robot, Aero-Space, military affairs, oil field mine, underwater operations and be all with a wide range of applications at civil areas such as household electrical appliance, medicine equipments.
Wireless power transmission technology can be divided into microwave mode, RF-wise, magnetic induction coupled modes and magnetic resonance coupled modes etc. according to realizing principle.Microwave type transmission of electricity essence is to utilize microwave boundling to replace transmission pressure, wave beam is collected by receiving rectification antenna after by free space, thereby realize high-power, long term distance transmission of electricity, to solving space orbit power supply, island power supply, surface power station electric energy, the question meaning such as to send outside remarkable, but microwave propagation can not penetrate thing; RF-wise realizes according to antenna transmission and record principle, thereby utilize electromagnetic field decay to break through long apart from transferring energy in far field relatively slowly, its frequency is very high, antenna Miniaturizable, the various mini-plants of convenient embedding, but transmitting antenna is generally omnidirectional antenna, energy spread degree is high, and power transmission efficiency, ability are very low and receive greatly to keep in check; Magnetic induction coupled modes utilize electromagnetic induction principle by the primary coil on different magnetic texures and the exchange of the mutual inductance between secondary coil electric energy, but the very big inferior position of inductive coupling type transmission of electricity is that its Energy Transfer distance is very near, is limited in a millimeter magnitude; The new technique that magnetic resonance formula wireless power transmission technology is a kind of non-radiation type of realizing based on magnetic resonance coupling principle, efficient, middle distance is transmitted electricity.
The key of magnetic resonance formula wireless power transmission technology is to make it that resonance coupling occur and not to system external radiation electromagnetic wave by suitable design and control, but affected by various factors, always produces thermal losses in a small amount of space radiation loss and field source etc.Consider that near field scope can not be too short, and must excite resonance coupling phenomenon, comparatively harsh to frequency requirement, generally adopt the frequency between 0.05MHz～50MHz, and select as far as possible lower frequency.Due to the medium that adopts alternating magnetic field to transmit as dimensional energy, resonant mode Energy Transfer mode is environmentally friendly, and without strict directivity, can give the receiving terminal power supply of a plurality of close resonance frequencys in effective coverage simultaneously.Compared to induction type, its Energy Transfer stable performance, distance.
The key of magnetic resonance formula wireless power transmission technology is to make it that resonance coupling occur and not to system external radiation electromagnetic wave by suitable design and control, but affected by various factors, always produces thermal losses in a small amount of space radiation loss and field source etc.Consider that near field scope can not be too short, and must excite resonance coupling phenomenon, comparatively harsh to frequency requirement.Due to the research to wireless power transmission, the frequency range adopting is wider, and traditional Radio Transmission Technology does not also realize application on a large scale, for the ease of expanding the range of application of wireless power transmission technology, need to improve wireless power technology, therefore, performance to energy transmitter-receiver device is had higher requirement, how adopting single energy transmitting terminal to realize the powerful transmitting of wide frequency range, and realize high efficiency Energy Transfer, is the problem that radio energy-transmitting is needed solution badly.
At present in document and patent, for Energy Transfer mode, mostly be based on air-core transformer principle, there is no the receiving coil electromotive force analysis that provides detailed wireless power transmission theory, mostly be the energy emitter of single-frequency simultaneously, be difficult to meet the requirement of wide frequency range wireless power transmission.
Summary of the invention
The object of the invention is to overcome the single or wide not shortcoming of frequency range of the frequency of prior art, propose a kind of wideband resonance type wireless electric energy transmission system.The present invention adopts single energy transmitting terminal, can realize the high-power wireless delivery of electrical energy of 62.5kHz～10MHz wide frequency range, and provides the receiving coil electromotive force analysis of detailed wireless power transmission theory, for the design of transmitting receiving coil provides effective means.The present invention adopts single energy emitter to realize the high-power transmitting of wide frequency range, realizes high efficiency Energy Transfer.Wireless electric energy transmission system of the present invention is wideband, and powerful resonance type wireless energy transmission system is simple in structure, can be applicable to the wireless field of power transmission such as wireless power, electric motor car charging of electric equipment.
Wideband resonance type wireless electric energy transmission system of the present invention comprises energy transmitting terminal and energy receiving terminal.Energy transmitting terminal is comprised of insulating power supply group, man-machine interaction unit, high-frequency signal generating unit, signal amplification unit, signal isolated location, high frequency drive unit, chokes unit, frequency conversion and power amplification unit, the first matching capacitance and transmitting coil, and wherein insulating power supply group comprises control circuit DC and main circuit DC; Energy receiving terminal is comprised of receiving coil, the second matching capacitance, frequency adjustment and operating load.
Connected mode in energy transmitting terminal between each unit is: the control circuit DC in insulating power supply group connects man-machine interaction unit, high-frequency signal generating unit and high frequency drive unit, main circuit DC connects chokes unit simultaneously, the output of man-machine interaction unit connects the input of high-frequency signal generating unit, the output of high-frequency signal generating unit connects the input that signal amplifies, the output of signal amplification unit connects the input of signal isolated location, the output of signal isolated location connects high frequency drive unit input, high frequency drive unit output connects frequency conversion and power amplification unit input, the output of chokes unit connects the power input of frequency conversion and power amplification unit simultaneously, power amplification unit output connects the first matching capacitance, the first matching capacitance connects transmitting coil, the first matching capacitance and transmitting coil form resonance radiating circuit.Signal transmission form is: insulating power supply group is to man-machine interaction unit, high-frequency signal generating unit and high frequency drive unit provide control circuit power supply DC, main circuit power DC is offered to chokes unit simultaneously, the output signal of man-machine interaction unit inputs to high-frequency signal generating unit, the output signal of high-frequency signal generating unit inputs to signal amplification unit, the output signal of signal amplification unit inputs to signal isolated location, the output signal of signal isolated location inputs to high frequency drive unit, the output signal of high frequency drive unit inputs to frequency conversion and power amplification unit as driving, simultaneously the output signal of chokes unit inputs to frequency conversion and power amplification unit as main power source DC, the output signal of frequency conversion and power amplification unit inputs to the first matching capacitance, the output signal of the first matching capacitance inputs to transmitting coil, the outside carry high frequency electromagnetic field of transmitting coil.
In energy receiving terminal, receiving coil and the second matching capacitance connect to form resonance receiving circuit, resonant circuit rate of connections adjustment unit, and the output of frequency adjustment unit connects the input of operating load, to operating load, powers.Described wideband resonance type wireless electric energy transmission system finally can be realized 62.5kHz～10MHz frequency range, the wireless power transmission of power 1kW.
Described high-frequency signal generating unit is for generation of frequency conversion and the required driving signal of power amplification unit, is combined realization by FPGA with DDS, can produce within the scope of 62.5kHz～10MHz duty ratio random waveform arbitrarily.The selection of the each output frequency of high-frequency signal generating unit is controlled by man-machine interaction unit, and by the keyboard in man-machine interaction, the signal of controlling high-frequency signal generating unit produces.Isolated location adopts three winding retarders to realize, and adopting magnetic core magnetic permeability is 10, and inductance coefficent is 4～20nH/N
2, applying frequency scope is 0.1～10MHz, can bear power is 88W.
The main circuit of described wideband resonance type wireless electric energy transmission system adopts E class circuit, mainly chokes unit and frequency conversion and power amplification unit, consists of: the magnet ring inductance coefficent that chokes unit adopts is 12nH/N
2, applying frequency scope is 0.1～10MHz, magnetic permeability is 10, adopt wire diameter 1mm two strands of copper paint envelope curves and around; Power amplification unit adopts single tube high-power MOSFET to realize, and finally can realize the output of 62.5kHz～10MHz frequency range, radiating circuit loop current effective value 12A.
The first matching capacitance that described transmitting coil is corresponding with transmitting coil forms resonance radiating circuit, the second matching capacitance that receiving coil is corresponding with receiving coil forms resonance receiving circuit, resonance radiating circuit has identical resonance frequency with resonance receiving circuit, and the signal frequency of sending with high-frequency signal generating unit is identical, receiving coil is identical with transmitting coil diameter, wire diameter and number of turn parameter, or receiving coil is different from parameters such as transmitting coil diameter, wire diameter and the numbers of turn.Receiving coil can design according to formula with mating of transmitting coil diameter, wire diameter and number of turn parameter:
Wherein, V is the electromotive force on receiving coil, ω=2 π f, and f is resonance frequency, μ is permeability of vacuum, n
tand n
rbe respectively the number of turn of transmitting coil and receiving coil, a, b is transmitting coil and receiving coil radius, I is the electric current that transmitting coil flows through, k
2=ω
2μ ε, available k=ω/c in air, c is 3*10
8, L is the distance of transmitting coil and receiving coil.
Accompanying drawing explanation
A kind of wideband resonance type wireless of Fig. 1 electric energy transmission system theory diagram;
Voltage waveform on transmitting coil under Fig. 2 1.08MHz resonance frequency of the present invention;
Voltage waveform in receiving terminal load under Fig. 3 2MHz resonance frequency of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
The present invention carries out the wireless transmission of electric energy by coupled resonance mode, adopt single energy emitter to realize the high-power transmitting of wide frequency range, realizes high efficiency Energy Transfer.
Figure 1 shows that wideband resonance type wireless electric energy transmission system theory diagram of the present invention, radio energy transmission system of the present invention comprises energy transmitting terminal and energy receiving terminal.Energy transmitting terminal is by insulating power supply group, man-machine interaction unit, high-frequency signal generating unit, signal amplification unit, signal isolated location, high frequency drive unit, chokes unit, frequency conversion and power amplification unit, the first matching capacitance C
tand transmitting coil composition, insulating power supply group comprises control circuit DC and main circuit DC; Energy receiving terminal is by receiving coil, the second matching capacitance C
r, frequency adjustment and operating load form.
In energy transmitting terminal, connected mode between each unit is: the control circuit DC in insulating power supply group connects man-machine interaction unit, high-frequency signal generating unit and high frequency drive unit, main circuit DC connects chokes unit simultaneously, the output of man-machine interaction unit connects the input of high-frequency signal generating unit, the output of high-frequency signal generating unit connects the input that signal amplifies, the output of signal amplification unit connects the input of signal isolated location, the output of signal isolated location connects high frequency drive unit input, high frequency drive unit output connects frequency conversion and power amplification unit input, the output of chokes unit connects the power input of frequency conversion and power amplification unit, power amplification unit output connects the first matching capacitance C
t, the first matching capacitance C
tconnect transmitting coil, the first matching capacitance C
tform resonance radiating circuit with transmitting coil.Signal transmission form between each unit is: insulating power supply group is to man-machine interaction unit, high-frequency signal generating unit and high frequency drive unit provide control circuit power supply DC, main circuit power DC is offered to chokes unit simultaneously, the output signal of man-machine interaction unit inputs to high-frequency signal generating unit, the output signal of high-frequency signal generating unit inputs to signal amplification unit, the output signal of signal amplification unit inputs to signal isolated location, the output signal of signal isolated location inputs to high frequency drive unit, the output signal of high frequency drive unit inputs to frequency conversion and power amplification unit as driving, simultaneously the output signal of chokes unit inputs to frequency conversion and power amplification unit as main power source DC, the output signal of frequency conversion and power amplification unit inputs to the first matching capacitance C
t, the first matching capacitance C
toutput signal input to transmitting coil, the outside carry high frequency electromagnetic field of transmitting coil.
For energy receiving terminal, receiving coil and the second matching capacitance C
rconnect to form resonance receiving circuit, resonant circuit rate of connections adjustment unit, frequency adjustment output connects to operating load powers.Described wideband resonance type wireless electric energy transmission system finally can be realized 62.5kHz～10MHz frequency range, the wireless power transmission of power 1kW.
Described high-frequency signal generating unit is for generation of frequency conversion and the required driving signal of power amplification unit, by FPGA, be combined realization with DDS, can produce any duty ratio random waveform within the scope of 62.5kHz～10MHz, the each output frequency of high-frequency signal generating unit is selected to be controlled by man-machine interaction unit, by the keyboard in man-machine interaction, the signal of controlling high-frequency signal generating unit produces; Isolated location adopts three winding retarders to realize, and adopting magnetic core magnetic permeability is 10, and inductance coefficent is 4～20nH/N
2, applying frequency scope is 0.1～10MHz, can bear power is 88W.
Described wideband resonance type wireless electric energy transmission system main circuit adopts E class circuit, mainly chokes unit and frequency conversion and power amplification unit, consists of: the magnet ring inductance coefficent that chokes unit adopts is 12nH/N
2, applying frequency scope is 0.1～10MHz, magnetic permeability is 10, adopt wire diameter 1mm two strands of copper paint envelope curves and around; Power amplification unit adopts single tube high-power MOSFET to realize, and finally can realize the output of 62.5kHz～10MHz frequency range, radiating circuit loop current effective value 12A.
The first matching capacitance C that described transmitting coil is corresponding with transmitting coil
tform resonance radiating circuit, the second matching capacitance that receiving coil is corresponding with receiving coil forms resonance receiving circuit, resonance radiating circuit has identical resonance frequency with resonance receiving circuit, and the signal frequency of sending with high-frequency signal generating unit is identical, receiving coil is identical with transmitting coil diameter, wire diameter and number of turn parameter, or receiving coil is different from parameters such as transmitting coil diameter, wire diameter and the numbers of turn.Receiving coil can design according to following formula with mating of transmitting coil diameter, wire diameter and number of turn parameter:
Wherein, V is the electromotive force on receiving coil, ω=2 π f, and f is resonance frequency, μ is permeability of vacuum, n
tand n
rbe respectively the number of turn of transmitting coil and receiving coil, a, b is transmitting coil and receiving coil radius, I is the electric current that transmitting coil flows through, k
2=ω
2μ ε, available k=ω/c in air, c is 3*10
8, L is the distance of transmitting coil and receiving coil.
One embodiment of the invention is usingd bulb parallel connection that 8 nominal values are 60W as load.The output signal of the high frequency drive unit of setting is 1.08MHz square wave, transmitting coil and receiving coil diameter are 20cm, transmitting coil 9 circles, receiving coil is 14 circles, transmitting and receiving coil matching capacitance all adopts high voltagehigh frequency mica capacitor, when 8 60W bulb Operation at full powers, when receiving terminal power is 480W, obtained the efficiency from main power source end to receiving terminal 97.6%.Figure 2 shows that under this loading condition transmitting coil both end voltage waveform under 1.08MHz resonance frequency.Figure 3 shows that under 2MHz resonance frequency of the present invention voltage waveform in receiving terminal load.
Claims (4)
1. a wideband resonance type wireless electric energy transmission system, is characterized in that, described radio energy transmission system comprises energy transmitting terminal and energy receiving terminal; Energy transmitting terminal is by insulating power supply group, man-machine interaction unit, high-frequency signal generating unit, signal amplification unit, signal isolated location, high frequency drive unit, chokes unit, frequency conversion and power amplification unit, the first matching capacitance (C
t) and transmitting coil composition; Described insulating power supply group comprises control circuit DC and main circuit DC; Described control circuit DC connects respectively man-machine interaction unit, high-frequency signal generating unit and high frequency drive unit, and main circuit DC connects chokes unit; The output of described man-machine interaction unit connects the input of high-frequency signal generating unit, the output of high-frequency signal generating unit connects the input that signal isolation is amplified, the output of signal amplification unit connects the input of signal isolated location, the output of signal isolated location connects high-frequency drive input, high frequency drive unit output connects frequency conversion and power amplification unit, the output of chokes unit connects the input of frequency conversion and power amplification unit, and power amplification unit output connects the first matching capacitance (C
t), the first matching capacitance (C
t) connection transmitting coil, the first matching capacitance (C
t) and transmitting coil composition resonance radiating circuit; Energy receiving terminal is by receiving coil, the second matching capacitance (C
r), frequency adjustment unit and operating load form; Described receiving coil and the second matching capacitance (C
r) form resonance receiving circuit, resonant circuit rate of connections adjustment unit, the output of frequency adjustment unit connects operating load, to operating load, powers.
2. wideband resonance type wireless electric energy transmission system according to claim 1, it is characterized in that, high-frequency signal generating unit is for generation of frequency conversion and the required driving signal of power amplification unit, by FPGA, be combined realization with DDS, can produce within the scope of 62.5kHz～10MHz duty ratio random waveform arbitrarily; Man-machine interaction unit is controlled the selection of the each output frequency of high-frequency signal generating unit, and by the keyboard in man-machine interaction, the signal of controlling high-frequency signal generating unit produces; Isolated location adopts three winding retarders to realize, and adopting magnetic core magnetic permeability is 10, and inductance coefficent is 4～20nH/N
2, applying frequency scope is 0.1～10MHz, bearing power is 88W.
3. wideband resonance type wireless electric energy transmission system according to claim 1, it is characterized in that, described wideband resonance type wireless electric energy transmission system main circuit adopts E class amplification circuit, consists of: the magnet ring inductance coefficent that chokes unit adopts is 12nH/N chokes unit and frequency conversion and power amplification unit
2, applying frequency scope is 0.1～10MHz, magnetic permeability is 10, adopt wire diameter 1mm two strands of copper paint envelope curves and around; Power amplification unit adopts single tube high-power MOSFET to realize, and can realize the output of 62.5kHz～10MHz frequency range, radiating circuit loop current effective value 12A.
4. wideband resonance type wireless electric energy transmission system according to claim 1, it is characterized in that, the matching capacitance that transmitting coil is corresponding with transmitting coil forms resonance radiating circuit, the matching capacitance that receiving coil is corresponding with receiving coil forms resonance receiving circuit, resonance radiating circuit has identical resonance frequency with resonance receiving circuit, and the signal frequency of sending with high-frequency signal generating unit is identical; Receiving coil mates according to following formula design with transmitting coil diameter, wire diameter and number of turn parameter:
Wherein, V is the electromotive force on receiving coil, ω=2 π f, and f is resonance frequency, μ is permeability of vacuum, n
tand n
rbe respectively the number of turn of transmitting coil and receiving coil, a, b is transmitting coil and receiving coil radius, I is the electric current that transmitting coil flows through, k
2=ω
2μ ε, in air, with k=ω/c, c is 3*10
8, L is the distance of transmitting coil and receiving coil.
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| CN201410265326.7A CN104065175B (en) | 2014-06-13 | A kind of wideband resonance type wireless electric energy transmission system |
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|---|---|---|---|
| CN201410265326.7A CN104065175B (en) | 2014-06-13 | A kind of wideband resonance type wireless electric energy transmission system |
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| CN104065175A true CN104065175A (en) | 2014-09-24 |
| CN104065175B CN104065175B (en) | 2016-11-30 |
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| CN105846551A (en) * | 2016-03-11 | 2016-08-10 | 东华大学 | Wireless power transmission device with adjustable dual-function |
| CN106037269A (en) * | 2016-05-30 | 2016-10-26 | 华南理工大学 | Intelligent thermal insulation table device based on magnetic resonance wireless energy transmission and working method of intelligent thermal insulation table device |
| CN110429699A (en) * | 2019-05-24 | 2019-11-08 | 华南理工大学 | A kind of machine continuation of the journey system of multiclass energy mixing supply |
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